Abstract

INTRODUCTION

Annexin A1 (AnxA1) is a protein that inhibits the inflammatory response and is expressed by various types of cells and tissues. Colorectal cancer, a very common type of cancer today, is accompanied by the development of inflammation. At present study, it has been aimed to evaluate the relationship between AnxA1 protein and the development of inflammation in colorectal cancer.

METHODS

The study was conducted with 74 colorectal cancer patients and 79 healthy patients as the control group. Serum and RNA were isolated from the blood samples collected from volunteers. AnxA1 and interleukin-6 (IL-6) levels in circulation as well as the activity of cytosolic and secretory phospholipase A2 (cPLA2, sPLA2) were determined using Elisa method. AnxA1 and PLA2 mRNA expression levels were measured by real-time PCR technique.

RESULTS

While serum AnxA1 levels were significantly decreased in patients group, IL-6 and sPLA2 levels were detected to be increased. AnxA1 mRNA expression was also significantly reduced compared to the control group. The decrease in AnxA1 level was found to correlate with the increase in inflammation markers.

DISCUSSION AND CONCLUSION

The present study has shown significant changes on AnxA1 plasma protein levels and mRNA expression in colorectal cancer patients. The data have revealed that AnxA1 protein may be associated with inflammation in colorectal cancer. Further studies are needed to elucidate the mechanism of dysregulation in the Annexin protein system.